JPH03193413A - Production of functional synthetic resin molded body - Google Patents

Abstract

PURPOSE:To carry out a long running production of the above body without impairing moldability by dispersing and sticking powder for inclusion which incorporates volatile functional substance on the surface of granular thermoplastic synthetic resin material and supplying this obtained mixture to a molding machine and molding the mixture without forming a master pellet. CONSTITUTION:Granular thermoplastic synthetic resin material (pellet) is mixed at the temp. of at least 40 deg.C and not higher than softening temp. The powder for inclusion of functional substance is dispersed and stuck on the surface of the pellet. This obtained mixture is utilized. When the granular thermoplastic synthetic resin material is mixed at >=40 deg.C, the surface of the granule is somewhat softened and the powder for inclusion which incorporates the volatile functional substance is stuck on the surface. Thereby it is avoided that the volatile functional substance having a problem in thermal stability may be locally present at the high concentration and the volatile functional substance is furthermore uniformly dispersed in an extruder. Further unfavorable thermal deterioration and thermal decomposition which hinder long running can be avoided by an extremely simple means.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a method for producing a monofunctional synthetic resin molded article. The product obtained by this invention can be applied to, for example, household goods, industrial materials, etc., and by appropriately volatilizing the volatile functional substance contained therein, the shape of the molded body and the function of the volatile substance are combined. [Prior art] Thermoplastic synthetic resins are used in the production of extrusion molded bodies, injection molded bodies, etc. due to their excellent workability. A perforated molded body is produced.

On the other hand, in order to add various functions to a single synthetic resin molded article, a function-imparting substance (simply referred to as a functional substance) is added. Among them, many flavoring agents exhibit their functions by volatilizing additive substances from the synthetic resin molded body into the surrounding environment.

Animal repellent, insecticide, fungicide, fungicide, rust preventive.

Plant growth regulators, herbicides, etc. are examples of these volatile functional substances.

JP-A No. 61-137804 discloses that cyclodextrin clathrate compound powder, which is an insecticide, is mixed and melted with a synthetic resin material, then molded into pellets, and either the pellets are molded as they are or they are made into relatively high-concentration master pellets. It has been shown that it can be mixed with a resin material and molded to produce plant growing tools.

Furthermore, synthetic resin products containing compounds clathrated with cyclodextrins and sugar alcohols are also known for many functional substances (Japanese Patent Publication No. 63-6588).

Japanese Patent Application Laid-open No. 55-94954 discloses a synthetic resin product in which a powder of inclusions of a flavoring agent is mixed with a thermoplastic synthetic resin material and molded. Although the disclosure is extremely simple, 2.3 molding pellets are shown as one synthetic resin material. However, there is no specific description of the method of mixing with the inclusion powder.

[Problems to be Solved by the Invention] As a result of manufacturing a functional synthetic resin molded article using pellets as described above, the present inventor found that in the case of a long run,
It has been found that there is a problem of deterioration of moldability. That is, a mixture of master pellets containing the clathrated pyrethroid insecticide and high-density polyethylene pellets is extruded.

Taking the case of producing a reticulated molded product as an example, there is no particular inconvenience during the 2 to 3 hours of operation, but
If the product is operated for a long time, for example, for 10 hours or more, it will wrap around the screw, making the extrusion amount unstable and causing unevenness in the insecticide content in the molded product. When the extruder was disassembled, there was burnt material stuck to the machine in the compression zone. Such inconveniences are thought to be due to thermal alteration, thermal decomposition, etc. caused by the monofunctional substance, and are particularly noticeable in areas where resin tends to accumulate, and are thought to be an extremely serious problem in practice.

Furthermore, the results of such thermal alteration, retention, volatilization, etc.

There is also the problem that it is not possible to stably obtain a molded article containing a functional substance at the designed concentration (calculated value).

Even when using a functional substance inclusion powder that has already been diluted with resin to some extent, such as a master pellet, such a problem exists. Even more serious problems are expected when a monofunctional substance clathrate powder is directly mixed with pellets.

It is an object of the present invention to solve these problems and provide a method for producing a functional synthetic resin molded article that can be produced over a long period of time without deteriorating moldability.

[Means for Solving the Problems] According to the present invention, such problems can be solved by applying a mixture in which an inclusion powder containing a volatile functional substance is dispersed and adhered to the surface of a thermoplastic synthetic resin granular material to a molding machine. This can be solved by molding without going through preparation and master pellets.

One of the specific embodiments is a manufacturing method using a mixture in which functional substance inclusion powder is dispersed and adhered to the surface of thermoplastic synthetic resin granular material (pellet) by mixing at a temperature of 40°C or higher and lower than the softening temperature. It is. Mixing temperatures of 40@C or higher are usually a high-speed rotating mixer.

For example, this can be achieved by heat generation using a Henschel mixer, but a jacket or other arbitrary temperature control means can also be used.

When the thermoplastic synthetic resin granular material is mixed at 40° C. or higher, the surface of the nine particles becomes slightly softened, and the clathrate powder containing the volatile functional substance is adhered to the surface.

This avoids the presence of one locally high concentration of volatile functional substances that have problems with thermal stability.

More uniform dispersion in the extruder 0 Because there is no initial adhesion and dispersion in the usual mixing at room temperature.

Locally high concentration and stagnation occur in the extruder, which causes deterioration and decomposition troubles.

The suitable mixing temperature for achieving adhesion and dispersion varies depending on the type of resin; for soft ones such as polyvinyl acetate resin, it is 40 to 50°C, and for polyethylene, EVA, etc., it is 50 to 50°C.
70°C, which is even higher for hard resins such as polyamide. If the temperature is too high, there are disadvantages such as excessive power required for mixing, so a mixing temperature lower than the softening temperature of the resin is selected.9 Usually, a temperature of up to 100'C is often selected.

1. Implement the present invention by adding a small amount of a binder such as a low melting point resin to the pellets, stirring vigorously, and adding and mixing the 9-functional substance clathrate powder to achieve an adhering and mixed state at a lower mixing temperature. You can also do that.

The nine main points of the configuration of the present invention have been described above.

The elements of the functional synthetic resin molded article to which the manufacturing method of the present invention is applied, including inclusions, resin, shape of the molded article, etc., will be further explained as follows.

(Functional Substances and Inclusion Agents) Volatile function-imparting substances to be included in the molded article include: 1. For example, harmful animal control agents such as animal repellents and insecticides, microbial control agents such as bactericides and fungicides, growth regulators,
Plant regulators such as herbicides.

There are rust preventive agents, flavoring agents, etc. 1. An appropriate one can be selected and used depending on the purpose of use of each molded product and the state of the art at the time of implementation. Pyrethroid insecticides and fragrances are typical examples.

Inclusion agents are host substances that surround guest substances to form clathrate compounds, and various substances such as cyclodextrin, hydroquinone, urea, thiourea, and crown ether are described in literature (for example, Japanese Patent Publication No. 54-43382. In the present invention, which is known from the Japanese Patent Publication No. 62-89675, the type of inclusion agent to be used can be selected depending on the state of the art at the time of implementation, but cyclodextrin is primarily considered. It is an inclusion agent that should be used.

(Inclusion Compound) In the present invention, since the functional substance is used as an inclusion powder, it is possible to facilitate handling such as supply and mixing by adding a substance that is difficult to handle, such as oil, as a powdered clathrate compound. .

Furthermore, substances that are difficult to disperse in synthetic resins in their original form may be made easier to disperse as clathrate compounds6.
In some cases, it is difficult to disperse the clathrate compound in the synthetic resin, but in that case, in addition to the high-temperature mixing according to the present invention,
It is desirable to use an additive 1 having affinity for both the synthetic resin and the clathrate compound, such as a lipophilic and hydrophilic amphoteric compound, to achieve uniform dispersion.

In the synthetic resin molded article thus obtained.

It is not necessary to specify the form in which the volatile substance exists; there is no need to specify the clathrate, the type of volatile substance,
Depending on the processing conditions, it may exist primarily as an clathrate compound in the molded product, or the host-guest relationship may be broken during the molding process. There are also cases where both are mixed. In short, it is sufficient that the functional substance has its function and is in a state where it can volatilize in a well-balanced manner in the atmosphere, and that it does not cause deterioration problems during molding.

Examples of volatile insecticides used in the present invention include pyrethroid allethrin, phthalthrin, resmethrin, flamethrin, phenothrin, permethrin, and phosphorus fenitrothion. Japanese Patent Publication No. 59-7810
You can use the items listed in 5. As a flavoring agent, 1
Various natural fragrances and synthetic fragrances can be used. Examples of these are also described in Japanese Patent Publication No. 63-6588.

As an inclusion agent, cyclodextrin (αβ-1γ-)
, urea, thiourea, crown ether, cryptand, etc. Select from those introduced in the bottom book (for example, Takemoto: Chemistry of past inclusion compounds, Tokyo Kagaku Doujin; Tabushi: Chemistry of host and guest, Kyoritsu Shuppan, etc.) can. In particular, cyclodextrin is commonly used, and its single substances, mixtures thereof, mixtures of these with sugar alcohols, reaction mixtures containing cyclodextrins, etc. have the ability to clathrate guest substances, 3 affinity with synthetic resins, and stability. It can be used depending on selection criteria such as price.

In addition, when selecting volatile substances and inclusion agents.

It goes without saying that those skilled in the art can select what they deem suitable depending on the purpose of implementation and the state of the art at the time.

(Thermoplastic synthetic resin) Specific examples of thermoplastic synthetic resins include high density polyethylene (HDPE), low density polyethylene (LDPE),
Polyolefin resins such as polypropylene, ethylene-
Contains olefin copolymer resins such as vinyl acetate copolymer resins (EVA), ethylene-acrylic acid alkyl ester copolymer resins (typically EEA, that is, those containing 5% or more of ethyl ester), and esters of acrylic acid and methacrylic acid. Examples include various vinyl resins such as acrylic resins, polyvinyl chloride resins, and polystyrene resins, and condensation resins such as polyester and polyamide, and these resins can be used depending on the purpose.

A typical particulate material used alone or in a mixture is pellets.For example, high density polyethylene or polypropylene for rigid nets.

For the elastic net, a vinyl acetate synthetic resin such as EVA or a mixture of EVA and polyethylene, or an acrylic synthetic resin such as EEA is preferably used, and for the perforated molded body, low density polyethylene or the like is suitably used.

Thus, especially polyolefin resins, mixtures of olefin copolymer resins and polyolefin resins.

This is a typical synthetic resin material often used in the present invention.

The resin compositions described in Japanese Patent Publication No. 6B-9546 and Japanese Patent Publication No. 62-19461 have transparency, flexibility, and heat resistance.

It has characteristics such as non-slip properties and non-toxicity, and is suitable for applications that require these properties. In addition to these characteristics, the former is also excellent in low temperature resistance.

(Mixing method) In the present invention, a thermoplastic synthetic resin granular material and an inclusion powder containing a volatile functional substance are mixed at high temperature,
After realizing the adhesion and dispersion state, the 0 circumferential speed of molding is 10 to 5
A Henschel mixer with rotating blades at a high speed of 0 m/s is a useful mixing means. If you heat it a little at first, the temperature will reach 40＠C while mixing.
As a result, a uniform adhesion and dispersion state is achieved. In the case of a Henschel mixer, mixing times of up to a few minutes are sufficient.

Of course, other heating means and mixing means can also be used at temperatures above 40°C.

There is no problem as long as a uniform adhesion and dispersion state can be achieved.

For example, put low-density polyethylene (LDPE) pellets into a Henschel mixer and use a rotary blade for winding up 1
Stir for 3-5 minutes at a circumferential speed of 20 m/sec. When the surface temperature of the pellet reached approximately 50°C, a predetermined amount of clathrate compound powder, which is a monofunctional substance, was added.

Subsequently, the mixture is mixed for about 1 hour, stirred, and discharged to obtain a mixture in which the clathrate powder is uniformly dispersed and adhered to the pellet surface. The surface temperature of the pellets can be detected by a thermocouple sensor attached to the tip of a deflector installed in the tank of the Henschel mixer.

In addition, the surface temperature of the pellets was set to a relatively high value (60 to 10
In the case of synthetic resins that are difficult to adhere to clathrate powders unless heated to 0°C, it is possible to preheat them by passing a heating medium such as steam through the jacket of the Henschel mixer. Mixing and stirring time can be shortened.

The rotating blades of the Henschel mixer may be of standard specifications (top: for mixing, bottom: for shearing), but the mixture can be obtained more efficiently if the lower blade is a special blade for winding up. Further, by using a spacer to raise the tank height by 10 to 15 degrees above the bottom surface of the tank, pellets can be prevented from being caught and good operating conditions can be maintained.

Figure 1 shows a cross-sectional view of an example of the device used for mixing.

FIG. 2 is a plan view showing the shape of the blade used in the device shown in FIG. 1.

In this way, it is possible to obtain a mixture in which the clathrate powder is dispersed and adhered to the surface of one synthetic resin granular material.

This is put into the hopper of an extruder and subjected to extrusion molding.

(Molded product, molding method) The molded product is a thermoformed product such as an extrusion molded product or an injection molded product. In particular, six typical synthetic resin perforated moldings that can be typically applied to the production of thermoplastic synthetic resin perforated moldings by extrusion molding include sheet, film, plate-shaped integrally molded nets, tubular moldings such as mesh tubes, etc. These are integrally formed nets, plate-shaped perforated bodies, tubular perforated bodies (Japanese Patent Publication No. 52-4875), etc.Integrated nets have strands running diagonally with respect to the longitudinal direction, such as rhombuses and hexagonal openings ( Tokuko Sho 34-4185)
and.

There is a square type with strands running in the longitudinal direction and the direction perpendicular to the longitudinal direction (Japanese Patent Publication No. 43-24556).
It is known as Netron (registered trademark).

An example of a tubular integrally molded mesh is shown in FIG. 3. The synthetic resin perforated molded body is continuous. Further, depending on the case, it may be composed of a foam having independent cells.

The present invention can also be applied to the production of sheet films by extrusion molding. Moreover, it is also possible to mold artificial bamboo made of a synthetic resin-coated steel pipe using an extruder for producing steel pipes. By combining the irregular mold of the lot number type and the extruder, it is possible to obtain a cotton molded article 1 having an irregular cross section, for example, a molded article having a hollow rib structure.

For extrusion molding conditions, reference may be made to the method described in Japanese Patent Publication No. 52-4675. Examples of temperature conditions are also described in Examples.

Regarding injection molding, containers, blunters, housings for various equipment, etc. can be cited as examples of injection molded products that can be carried out by combining various molds and molding machines based on the technical level and ingenuity of those skilled in the art. can.

[Effect of the invention] Usually, the molding temperature for obtaining a molded article using a thermoplastic resin is 1
For example, the temperature is around 200°C, and depending on the type of one-functional substance, volatilization or decomposition during molding may cause problems if used in its original state, especially deterioration inside the molding machine during long-run operation, such as deterioration, one-turn sticking, and scorching. The possibility of trouble could be fatal as an industrial technology.

In the present invention, in order to obtain a synthetic resin molded article that contains a volatile functional substance and an clathrate and exhibits the functions of the added volatile substance, a clathrate compound powder and a synthetic resin pellet are processed at high speed. A 9-dispersion deposit is obtained by means such as a rotary mixer and formed into a desired shape.

In the present invention, nine functional substances are added as clathrate compounds.

In addition, by eliminating uneven dispersion by adhering the powder to the pellet surface, it is possible to avoid inconvenient thermal alteration and thermal decomposition that impede long-run performance with an extremely simple means. There is no need to go through a master pellet as shown, which simplifies the process.

Furthermore, the thermal history of the bifunctional material is effectively reduced from two stages of pellet molding and object molding to one stage. The mixture is 10
06C or less.

As a thermal history, it can be virtually ignored. This point too.

Together with surface adhesion and dispersion, it helps prevent loss due to volatilization and decomposition, allowing concentration control as calculated.

[Examples] Example 1 (Preparation of insecticide clathrate compound powder by solution method) A pyrethroid insecticide was added to a saturated aqueous solution of β-cyclodextrin (Sanraku RINGDEX-B) 75 parts (parts mean parts by weight; the same applies hereinafter). Add 25 parts of the agent permethrin (Sumiman Kagaku Exmin) and mix and stir at 50-55"C for 1-2 hours. 6. Collect the resulting precipitate by filtration, vacuum dry (below 55"C), and powder with 150 mesh passes. Obtain the clathrate.

(Mixture of clathrate compound powder and synthetic resin pellet) Low-density polyethylene (LDPE, Sumikagaku Sumi Rikisen G-20
1) Put 98 parts of pellets into a Henschel mixer and use a rotating blade to wind it up.

3 at a circumferential speed of 20 m/s until the pellet temperature reaches 50°C.
After continuing to rotate for ~5 minutes, 2 parts of the permethrin clathrate compound powder obtained above is added and further stirred to obtain a pellet with the powder evenly adhered to the surface of the pellet. The permethrin concentration of the mixture is 0.5%.

Note that a dispersed adhesion mixture can be obtained in the same manner when ethylene-vinyl acetate copolymer resin (EVA) or ethylene-methyl methacrylate copolymer resin (EMMA) is used instead of LDPE.

(Sheet extrusion molding) Using a single screw extrusion molding machine, the above adhesion mixture was molded to a thickness of 0.51 mm.
Form into a 1!1 sheet (sample ■).

It can be confirmed that the calculated permethrin concentration, no coloring of the sheet (heat resistance), and uniformity of appearance (dispersibility) were maintained during the 20 hours of operation.

Extrusion molding conditions (temperature "C") Ikegai G565-28.65.L/d-28, bent type T die width 500mv lip opening 0.5mm cylinder temperature CI C2C3C4At A2170180190
200210210 Dice temperature Di D2 D3
D4 D5200200200200200 Number of revolutions per screw 25rpff1. Pick up speed 2+g1
minute roll temperature 90.40 Example 2 Comparison with masterbatch method Sample 1 For comparison with sample ■, the same permethrin clathrate powder and LDPE pellets used in Example 1 were used, and the theoretical permethrin concentration was 0.5%. Create a sample. L
20 parts of a master batch obtained by mixing and melting 10% clathrate powder with respect to DPE and molding it into a pellet shape and 80 parts of LDPE pellets were mixed in a tumbler to a thickness of 0°511I+1 under the same conditions as Example 1. Form into a sheet.

The moldability is as good as in Example 1 for the first 2 to 3 hours, but after 10 hours or more, the resin, mainly the masterbatch, wraps around the screw, so the amount of extrusion becomes stable. First, the thickness of the sheet becomes uneven, and the insecticide m content in the molded product becomes uneven. Continuing to shape Sasagi.

In some cases, the balance between feed and metering is disrupted, making extrusion impossible. At this time, when the extrusion molding machine is disassembled, burnt spots and substances stuck to the screws are found mainly in the compression zone.

Dispersibility is compared by visual observation of the sheet.

Initially, a good product (sample ■) similar to sample ■ is obtained.

The heat resistance of sample ■ and sample ■ is as follows:
The specimen was kept in the gear oven of C, and the degree of coloration (staining phenomenon) of the exterior was followed and observed. Sample ■ is.

Browning started after 100 hours, but no change was observed in sample ① during observation up to 130 hours.

Measurement of functional substance content: 100 sheets were sampled over time immediately after molding.
Dissolve in 0-dichlorobenzene at ~120°C. Permethrin in a methanol-acetonitrile extracted sample is determined by gas chromatography.

The results are shown in Figure 4.

Immediately after molding, the permethrin concentration of sample (1) was as per the designed value, and gradually volatilized and decreased. Sample (2) shows a considerable loss of 0.41% even immediately after molding.

Insecticidal effect test: Sugar water was placed in a 25CI 11 square transparent acrylic container (2) (survival air was supplied), sample (2), sample (2)
5cm2) on the side, put 100 houseflies in it, and observe the number of deaths over time. The mortality rate (%) is as follows.

Immediately after extrusion Time after 1 year Sample ■ Sample ■ Sample ■ Sample ■ 1 11
8 25 202
Bo 223 50 41 50 36
6 60 5112 72
59 80 6324 89 74
82 7248 95 85 91 80
Example 3 LDP described in the section of mixing clathrate powder and pellets in Example 1, such as a reticular compact
E/Inclusion Permethrin Dispersion Deposition Mixture.

Using the EVA/clathrate permethrin dispersion adhesion mixture, a net-like molded body is manufactured using an extrusion molding machine for manufacturing a net-like body under the following conditions.

LDPE Cylinder temperature Die temperature CI C2
C3C4D Reticulated plate body 185195205205210 Reticulated tube body 190200210210215 EVA Cylinder temperature Die temperature CI C2C3C4D Reticulated plate body 175185195195200 Reticulated tube body 180190200200205 Synthetic resin coated steel pipe Bamboo 6 Similarly, by special extruder Manufacture.

Example 4 (Preparation of insecticide clathrate compound powder by cross-mixing method) A small amount of water was added to 75 parts of β-cyclodextrin, and 25 parts of permethrin was added to the kneaded slurry, followed by vigorous mixing and stirring at room temperature for about 1 hour. The resulting paste is freeze-dried to obtain 150 mesh bags of the powdered clathrate compound. Spray drying may also be used.

Mixing of clathrate compound powder and synthetic resin pellets.

Molding can be carried out in the same manner as in Example 9, Example 11, and Example 3.

Example 5 (Preparation of flavoring clathrate compound powder by solution method) To a saturated aqueous solution of 80 parts of β-cyclodextrin, 20 parts of vanilla flavoring (Sanei Chemical Industry Co., Ltd.) containing vanillin as a main component was added.
Mix and stir at ~55"C for 1 to 2 hours. The resulting precipitate is collected by filtration and dried under vacuum (559C or less) to obtain a powdery clathrate compound of 150 mesh baths.

A blowing agent (eg, a lower hydrocarbon or azodicarboxylic acid amide) may be added during the above reaction to include the fragrance together with the fragrance.

A flavoring clathrate compound powder can also be prepared in a manner similar to Example 4 by cross-fertilization.

(Mixing of clathrate compound powder and synthetic resin pellets) 96 parts of ethylene-methyl methacrylate copolymer resin (EMMA, Jumin Chemical Aclift WH-202) pellets were put into a Henschel mixer, and 1 3 to 5 times at a circumferential speed of 20 m/s until the pellet temperature reaches 50°C.
After continuing to rotate for a minute, 4 parts of the vanilla flavor clathrate compound powder obtained above is added and further mixed and stirred for 1 minute to obtain a pellet with powder evenly adhered to the surface of the pellet. The vanilla flavor concentration of the mixture is 0.8%.

(Sheet extrusion molding) The above-mentioned dispersed adhesion mixture is extruded using a single-screw extruder to obtain a reticular molded body.

E MMA Cylinder temperature Die temperature C
I C2C3C4AI At DI D2 reticular plate
12513513513514014014014G screw 1 rotation speed 6 Orpm.

Dice rotation speed 400 "Four mesh tube body 1301401401401451451
45145 Screw rotation speed yorpm.

Dice rotation speed: 500 rpH Example 6 Comparison with masterbatch method In order to compare with the reticular tube obtained in Example 5 (sample ■), the same vanilla flavor inclusion compound powder and EM as used in Example 5 were used.
A comparison sample with a theoretical concentration of 0.8% is prepared using MA pellets. Example 5: 40 parts of a masterbatch obtained by mixing and melting 10% clathrate powder with respect to EMMA and molding into pellets and 60 parts of LDPE pellets were mixed in a tumbler.
Molding under the same conditions. (Sample ■) Fragrant components are extracted from sheets sampled over time immediately after molding using dichloromethane, O-dichlorobenzene, etc., and quantitatively analyzed using gas chromatography.

Figure 5 shows the change in vanillin concentration.

Immediately after molding, the vanillin concentration of sample ① was approximately 90, which was the theoretical value.
% and gradually evaporates and decreases. Sample (3) shows a considerable loss of approximately 70% of the theoretical value even immediately after molding.

Example 7 Measurement using an odor sensor Using a new Cosmos Denki odor sensor (Model XP-329), the volatilization concentration of the fragrance was measured over time for Samples (1) and (2). The results are shown in Figure 6.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an example of an apparatus used for mixing a granular material and a clathrate powder in carrying out the present invention. FIG. 2 is a plan view showing the shape of the blades used in the device of FIG. 1. FIG. 3 is a perspective view showing the shape of an example of a tubular integrally formed network obtained by carrying out the present invention. Figure 4 shows the change over time in the residual rate of permethrin in the product implementing the present invention compared to the control product, and Figure 5 shows the change over time in the residual rate of vanillin in the product implementing the invention compared to the control product. The figure shown in FIG. 6 is a diagram showing the odor sensor readings of the product according to the present invention containing vanilla flavoring in comparison with the control product.

Claims (1)

[Claims] 1. By charging a mixture in which an inclusion powder containing a volatile functional substance is dispersed and adhered to the surface of a thermoplastic synthetic resin granular material into a molding machine, it is possible to mold the material without passing through a master pellet. 2. A method for producing a functional synthetic resin molded article, characterized by using a mixture in which the clathrate powder is dispersed and adhered to the surface of the granular material by heat generation by a high-speed rotating mixer. 3. Volatilization. The production according to claim 1, wherein the sexual functional substance is selected from the group consisting of pest control agents, microbial control agents, plant regulators, rust preventives, and flavoring agents, and the inclusion agent is cyclodextrin. Method 4: The manufacturing method according to claim 1, wherein the synthetic resin molded product is an extruded synthetic resin perforated molded product.